WoW Chatlog Colourizer and Filter

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DISCONTINUED: I no longer play WoW and I'm not going to continue updating this app. It still works with all pre-cata logs. It may work with 4.0.1+ logs depending on what you want to do, but expect errors.
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WoW Chatlog Colourizer is a small tool for converting World of Warcraft chat logs into HTML files, adding colour to make them look like actual in-game chat, and filtering out unwanted lines.

All colours and filters can be easily customized to match your in-game settings. Many other options are available, such as changing the time stamp format, inserting separators between login sessions etc.

The program also has a "Filter Only" mode in which it saves the output as .txt, without adding HTML tags.

Only logs recorded with the English-language client are supported (versions 2.2 - 4.0.1).

* Added compatibility with 3.3.5 and 4.0.1 chat logs
* Input and output paths are now saved between sessions
* The colourized chat log can now be set to open automatically as soon as the conversion's finished
* The application can now be run with the "-auto" parameter to enter a non-interactive mode which will automatically parse logs against the saved values
* Removed a bug that could sometimes cause the program to crash in Vista and Windows 7.
* ChatLogger Addon .toc updated to 40000

Thanks for the great program!
Any chance you could implement a simple spam filter for trade,yell? I wouldn't mind to keep them only once in the log.
With the spam my log is 10MB, without the spam it is 1MB, and that is only a few hours of dalaran.